Over the signal, in front of the right fork tube and through the tree to the left side of the neck, through the plastic grommet thingie and under the center of the backbone to the carbs. Many have moved the cables to the right side of the neck to gain the length needed for new bars/risers as noted in this current thread Rivco Risers

A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)